Follow along with the video below to see how to install our site as a web app on your home screen.
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Don't create a new game system, no need for that at all. The files just go into your data file directory. From the FAQ "You can find the path for user files by going to Tools -> Explore Folders -> Game Data Folder in Hero Lab. That should take you to the right place on either Windows or the Mac."
The "source" folder is for source data files for the system and is a reference only. That directory isn't actually read by the program.